Police are hoping that a quick use of technology will help them find a suspected bank robber.

Capt. John Dougan said an unarmed male robbed the South Coastal Bank at 77 Granite St. Friday morning, just after the bank opened at 9 a.m.

Thanks to an immediate check of the bank’s security video, Dougan said officers were able to take an iPhone photo of the suspect and transmit that image to the computers in all the cruisers on the streets.

“Within minutes, our patrol officers already had the picture, to be on the lookout,” Dougan said.

The suspect, a white male, was wearing a gray tee shirt, jeans and an off-white baseball cap. Dougan said he took an amount of cash and fled on foot toward Whitwell Street. Officers later found the shirt and cap on Presidents Lane.

Anyone with information about the incident is urged to contact detectives at 617-479-1212, or leave the information on the anonymous crime tip line on the police web site.